; 注释: .ll文件中注释以';'开头
; ModuleID = 'easy.c'
source_filename = "easy.c"
; 注释: target的开始
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
; 注释: target的结束

define dso_local i32 @main() #0 {
;创建并赋值a和i
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = alloca i32, align 4
  store i32 0, i32* %1, align 4
  store i32 10, i32* %2, align 4
  store i32 0, i32* %3, align 4
  br label %4
;循环的实现方法：先判断，判断不成立跳转到外面，判断成立跳转到循环体，循环体最后跳转到判断
4:
;i和10比较
  %5 = load i32, i32* %3, align 4
  %6 = icmp slt i32 %5, 10
  br i1 %6, label %7, label %13

7:
;读取1，自增，存回i
  %8 = load i32, i32* %3, align 4
  %9 = add nsw i32 %8, 1
  store i32 %9, i32* %3, align 4
;读取a和i，相加，存回a
  %10 = load i32, i32* %2, align 4
  %11 = load i32, i32* %3, align 4
  %12 = add nsw i32 %10, %11
  store i32 %12, i32* %2, align 4
;跳转回判断
  br label %4

13:;返回
  %14 = load i32, i32* %2, align 4
  ret i32 %14
}

attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "frame-pointer"="all" "less-precise-fpmad"="false" "min-legal-vector-width"="0" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }

!llvm.module.flags = !{!0}
!llvm.ident = !{!1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 10.0.1 "}